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Submission #558083

# Submission time Handle Problem Language Result Execution time Memory
558083 2022-05-06T18:47:23 Z status_coding Newspapers (CEOI21_newspapers) C++14
4 / 100
 3 ms 2772 KB 
#include <bits/stdc++.h>

using namespace std;

int n,m;

vector<int> v[100005];

int dp[100005];

void dfs(int p, int par)
{
    dp[p] = 1;
    bool can1=true, can=true;

    for(int it : v[p])
    {
        if(it == par)
            continue;

        if((int)v[it].size() == 1)
            continue;

        dfs(it, p);

        if(dp[it] == -1)
        {
            dp[p] = -1;
            return;
        }

        dp[p] = 2;

        if(dp[it] == 1 && can1)
            can1 = false;
        else
        {
            if(can)
                can = false;
            else
            {
                dp[p] = -1;
                return;
            }
        }
    }
}

int main()
{
    cin>>n>>m;

    if(m > n-1)
    {
        cout<<"NO";
        return 0;
    }

    for(int i=1;i<n;i++)
    {
        int x, y;
        cin>>x>>y;

        v[x].push_back(y);
        v[y].push_back(x);
    }

    for(int i=1;i<=n;i++)
    {
        dfs(i, 0);

        if(dp[i] != -1)
        {
            cout<<"YES\n";
            cout<<"1 1";
            return 0;
        }
    }

    cout<<"NO";
    return 0;
}

Subtask #1
0.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Partially correct 1 ms 2644 KB Failed to provide a successful strategy.
3 Partially correct 1 ms 2644 KB Failed to provide a successful strategy.
4 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
5 Partially correct 2 ms 2656 KB Failed to provide a successful strategy.
6 Partially correct 1 ms 2644 KB Failed to provide a successful strategy.
7 Correct 2 ms 2644 KB Output is correct
8 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
9 Correct 1 ms 2644 KB Output is correct
10 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
11 Partially correct 1 ms 2644 KB Failed to provide a successful strategy.
12 Partially correct 1 ms 2644 KB Failed to provide a successful strategy.
13 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
14 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
15 Partially correct 3 ms 2656 KB Failed to provide a successful strategy.
16 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
17 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
18 Partially correct 2 ms 2772 KB Failed to provide a successful strategy.
19 Partially correct 2 ms 2652 KB Failed to provide a successful strategy.
20 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
21 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
22 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
23 Partially correct 2 ms 2592 KB Failed to provide a successful strategy.
24 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
25 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
26 Partially correct 1 ms 2644 KB Failed to provide a successful strategy.
27 Incorrect 2 ms 2644 KB Output isn't correct
28 Halted 0 ms 0 KB -

Subtask #2
4.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Partially correct 1 ms 2644 KB Failed to provide a successful strategy.
3 Partially correct 2 ms 2580 KB Failed to provide a successful strategy.
4 Partially correct 2 ms 2592 KB Failed to provide a successful strategy.
5 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
6 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
7 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
8 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
9 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
10 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
11 Partially correct 2 ms 2636 KB Failed to provide a successful strategy.
12 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
13 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
14 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
15 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
16 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
17 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
18 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
19 Partially correct 3 ms 2772 KB Failed to provide a successful strategy.
20 Partially correct 3 ms 2644 KB Failed to provide a successful strategy.

Subtask #3
0.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Partially correct 1 ms 2644 KB Failed to provide a successful strategy.
3 Partially correct 1 ms 2644 KB Failed to provide a successful strategy.
4 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
5 Partially correct 2 ms 2656 KB Failed to provide a successful strategy.
6 Partially correct 1 ms 2644 KB Failed to provide a successful strategy.
7 Correct 2 ms 2644 KB Output is correct
8 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
9 Correct 1 ms 2644 KB Output is correct
10 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
11 Partially correct 1 ms 2644 KB Failed to provide a successful strategy.
12 Partially correct 1 ms 2644 KB Failed to provide a successful strategy.
13 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
14 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
15 Partially correct 3 ms 2656 KB Failed to provide a successful strategy.
16 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
17 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
18 Partially correct 2 ms 2772 KB Failed to provide a successful strategy.
19 Partially correct 2 ms 2652 KB Failed to provide a successful strategy.
20 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
21 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
22 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
23 Partially correct 2 ms 2592 KB Failed to provide a successful strategy.
24 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
25 Partially correct 2 ms 2644 KB Failed to provide a successful strategy.
26 Partially correct 1 ms 2644 KB Failed to provide a successful strategy.
27 Incorrect 2 ms 2644 KB Output isn't correct
28 Halted 0 ms 0 KB -